Method, device, and computer program product for determining a sensitivity of at least one eye of a test subject

Abstract

A method for determining a sensitivity of at least one eye of a test subject, including: determining a subjective refraction result for the at least one eye of the test subject; while determining the subjective refraction result, determining a first visual acuity of the at least one eye for a first applied refraction; while determining the subjective refraction result, determining a second visual acuity of the at least one eye for a second applied refraction, wherein the second applied refraction is different from the first applied refraction; and ascertaining the sensitivity of the at least one eye, considering the first and second visual acuities at the first and second applied refractions.

1 - 16 . (canceled) 
     
     
         17 . A method for determining a sensitivity of at least one eye of a test subject, comprising:
 determining a subjective refraction result for the at least one eye of the test subject;   while determining the subjective refraction result, determining a first visual acuity of the at least one eye for a first applied refraction;   while determining the subjective refraction result, determining a second visual acuity of the at least one eye for a second applied refraction, wherein the second applied refraction is different from the first applied refraction; and   ascertaining the sensitivity of the at least one eye, taking into account the first and second visual acuities at the first and second applied refractions.   
     
     
         18 . The method according to  claim 17 , wherein at least the first visual acuity is determined before the subjective refraction result for the at least one eye is determined. 
     
     
         19 . The method according to  claim 18 , wherein the determined subjective refraction result is used as the second applied refraction and the second visual acuity is determined for the determined subjective refraction result. 
     
     
         20 . The method according to  claim 17 , wherein the sensitivity of the at least one eye is ascertained on the basis of a sensitivity metric, and this ascertainment of the sensitivity is carried out from visual acuity measurements at applied refraction values which do not have a distance from one another and/or from the refraction result which distance is specifically predetermined and/or optimized for ascertaining the sensitivity. 
     
     
         21 . The method according to  claim 17 , wherein for determining the subjective refraction result, different optotypes are displayed, and while determining the subjective refraction result, a visual acuity belonging to the displayed optotypes is determined as the first and/or second visual acuity. 
     
     
         22 . The method according to  claim 17 , wherein the first applied refraction has a distance from the second applied refraction of at least half a diopter in the sphere and/or of at least one diopter of a cylinder. 
     
     
         23 . The method according to  claim 17 , wherein after determining the subjective refraction result, it is checked whether the first applied refraction has a predetermined spherical and/or cylindrical minimum distance from the second applied refraction, and in the event that this predetermined minimum distance is not reached, a third visual acuity for a third applied refraction is determined which is spaced apart from the first and/or second applied refraction at least by the predetermined minimum distance, and the sensitivity of the at least one eye is ascertained taking into account the third visual acuity at the third applied refraction. 
     
     
         24 . The method according to  claim 17 , wherein the sensitivity of the at least one eye is ascertained on the basis of a linear model in which a dependence of the sensitivity for a cylindrical refraction distance on the sensitivity for a spherical refraction distance is assumed. 
     
     
         25 . The method according to  claim 17 , wherein a third visual acuity of the at least one eye for a third applied refraction is determined, and wherein the sensitivity of the at least one eye is ascertained taking into account the first, second and third visual acuities at the first, second and third applied refractions on the basis of a bilinear model. 
     
     
         26 . The method according to  claim 17 , wherein the sensitivity is ascertained without taking into account the determined subjective refraction result. 
     
     
         27 . The method according to  claim 17 , wherein the determination of the subjective refraction result is performed by means of a refraction unit and/or the visual acuity determination is performed by means of optotypes displayed to the test subject. 
     
     
         28 . The method according to  claim 17 , wherein the determination of the subjective refraction result, the determination of the first and second visual acuity, and/or the determination of the sensitivity is performed with software support and/or at least partially automatically. 
     
     
         29 . The method according to  claim 17 , wherein the first visual acuity and/or the second visual acuity is determined monocularly and/or binocularly. 
     
     
         30 . The method according to  claim 17 , wherein the ascertained sensitivity is used to create at least one individual eyeglass lens for the test subject. 
     
     
         31 . A device for determining a sensitivity of at least one eye of a test subject comprising:
 a refraction unit configured to determine a subjective refraction result for the at least one eye of the test subject;   a visual acuity determination unit configured to, while determining the subjective refraction result, determine a first visual acuity of the at least one eye for a first applied refraction and a second visual acuity of the at least one eye for a second applied refraction, wherein the second applied refraction is different from the first applied refraction; and   a sensitivity ascertaining unit configured to ascertain the sensitivity of the at least one eye taking into account the first and second visual acuities at the first and second refractions.   
     
     
         32 . A non-transitory computer program product comprising computer-readable program parts which, when loaded and executed, cause a device for determining a sensitivity of at least one eye of a test subject to perform a method according to  claim 17 , wherein the computer program product at least partially controls and/or regulates a unit selected from a group consisting of: a refraction unit; a visual acuity determination unit; a sensitivity ascertaining unit; a controller; and an eyeglass lens data creation unit configured to create at least one individual eyeglass lens and/or to calculate at least one eyeglass lens surface from acquired measurement data.